3 years ago

1) A rock thrown horizontally from the top of a

Physics

1 answer:

9966 [12]3 years ago

3 0

Dx = 20m
V1 = 10m/s
g = 9.8m/s^2
(delta-t) = 2sec
dy = 19.6m

You might be interested in

A force of 6.0 N is applied horizontally to a 3.0 kg crate initially at rest on a horizontal frictionless surface. After the cra

Savatey [412]

Answer:

a. Yes, because the acceleration of the crate is 2.0 m/s².

Explanation:

Given

$Force = 6N$ --- f

$Mass = 3kg$ --- m

$Time = 1.5s$ --- t

$Velocity = 3.0m/s$ --- v

Required

Does the system support $F=ma$

Yes, it does and this is shown below

The crate is initially at rest; so:

$u = 0$

Using the first equation of motion

$v = u + at$

Substitute values for v, u and t

$3 = 0 + a*1.5$

$3 = 1.5a$

Make a the subject

$a = 3/1.5$

$a = 2$

Using $F = ma$

Substitute values for F and m

$6 = 3 * a$

Divide both sides by 3

$6/3 = 3/3 * a$

$2 = a$

$a = 2$

In both cases:

$a = 2$

<em>Hence, option (a) is correct.</em>

6 0

3 years ago

What changes occur in the molecular magnet when magnet is demagnetized

Olin [163]

Answer:

A magnet is demagnetized. There is a decrease in chemical potential energy. There is an increase in thermal energy. And there is an increase in energy in the form of demagnetization.

8 0

3 years ago

distance travelled = (ii) State the equation linking average speed, distance moved and time taken. v=¢ t

gulaghasi [49]

Average speed = total distance/total time.

5 0

2 years ago

Identify the scenario below as to whether they increase, decrease, or not change the frequency in which a string vibrates and th

telo118 [61]

Answer:1. Increase 2. Decrease 3. Decrease

Explanation:

4 0

3 years ago

An increase in temperature will ___________ the speed of a sound wave?

lbvjy [14]

I think it’s cause no change i think

3 0

3 years ago

Read 2 more answers